iRule expression error

Seems you are missing some curly brackets in your switch statement, right above and below your if statement.

when HTTP_REQUEST { 
     lowercase the host string received 
    switch -glob [string tolower [HTTP::uri]] {
        "/" { 
           HTTP::redirect "/123/login"
        }

        "/123/adminconsole.jsp" {
            if { [IP::addr [IP::client_addr] ne 10.0.0.0/8%5] } {
             Drop the connection
            reject
            }
        }

    }
}